Tutorial 10: Ultrawideband Radio Communications


J. R. Long; Delft University of Technology
R. Harjani; University of Minnesota

Time & Location

All Day Sunday, May 23, 08:30 - 16:15, Location: Junior Ballroom D


Over the past year, ultra-wideband (UWB) technology has received quite a bit of attention from both the academia and industry. The reason for this attention is that UWB communication systems promise data rates in excess of 110 Mb/s in realistic multi-path environments while consuming very little power and silicon area. It is expected that UWB communication systems can provide low cost solutions that satisfy the consumer's insatiable appetite for data rates. Much of the increased attention on UWB technology is due to the landmark ruling by the Federal Communications Commission (FCC). In February 2002, the FCC opened up 7,500 MHz of spectrum (from 3.1 GHz to 10.6 GHz) for use by UWB devices. This ruling has generated considerable interest towards the development of UWB communication systems; primarily through standards efforts like IEEE's 802.15.3a, and has created several new opportunities for innovation and technical advancement. This tutorial provides both timely and relevant information as worldwide interests for low power untethered communications systems increases.

The goal of this tutorial is to introduce the audience to the theory and design of UWB systems, digital and analog implementation issues, synchronization, antenna constraints and open problems and challenges. The audience is introduced to FCC, ETSI and CEPT spectral rules and regulations. We discuss both impulse-radio and carrier based UWB systems including a unified view that allows us to study the design of UWB systems and understand the effects of the various system parameters on performance. It also enables us to deal with multi-user access and multi-path effects in a single framework. We provide an overview of the proposals submitted to the IEEE 802.15 WPAN Task Group and describe various receiver designs for these systems and discuss channel estimation and synchronization issues related to these designs. We highlight similarities between UWB system design and modern radar signal design. We compare the various UWB techniques on various points, including ease of design, performance in dense multipath, spectral efficiency, implementation issues and multi-user access (including simultaneously operating piconets). We describe analog/RF front-end design tradeoffs related to both time-domain impulse radio and single and multi-carriers based UWB systems. We describe the impact of antennas, the transmit section, the receive section and the channel on UWB signals.

Presenter Information

V. Srinivasa Somayazulu (Zulu) is a Senior Staff Researcher with the Radio Communication Lab within Intel R&D. His current interests lie in the areas of UWB and OFDM system design at the physical layer, and MAC issues for high speed multimedia wireless networks. In the past he has worked in research and advanced development positions in the areas of digital TV broadcast systems, IS-95 and W-CDMA based cellular systems as well as OFDM based WLAN systems. He received his B. Tech from the Indian Institute of Technology, Madras, and the M.S. and Ph.D. degrees from the University of California, Santa Barbara.

John R. Long received the M.Eng. and Ph.D. degrees in Electronics from Carleton University, Canada in 1992 and 1996, respectively. He worked for 10 years at Bell-Northern Research, Ottawa (now Nortel Networks) designing ASICs for Gbit/s fibre systems, and for 5 years as a faculty member at the University of Toronto. He joined the faculty at the TU Delft in January 2002, where his current research interests include: low-power transceiver circuitry for highly-integrated radios and electronics design for high-speed data communications. Professor Long currently serves on the program committees of the ISSCC, ESSCIRC, IEEE-BCTM and GAAS 2004, and is a past Associate Editor of the IEEE Journal of Solid-State Circuits.

G. B. Giannakis received his B.Sc. in 1981 from the Ntl. Tech. Univ. of Athens, Greece and his M.Sc. and Ph.D. in Electrical Engineering in 1983 and 1986 from the Univ. of Southern California. Since 1999 he has been a professor with the Department of Electrical and Computer Engineering at the University of Minnesota, where he now holds an ADC Chair in Wireless Telecommunications. His general interests span the areas of communications and signal processing, estimation and detection theory -- subjects on which he has published more than 200 journal papers, 350 conference papers, and two edited books. Current research focuses on complex-field and space-time coding, multicarrier, ultra-wide band wireless communication systems, cross-layer designs and distributed sensor networks. He is the (co-) recipient of five best paper awards from the IEEE Signal Processing (SP) Society (1992, 1998, 2000, 2001, 2003) and also received the Society's Technical Achievement Award in 2000. Prof. Giannakis is a Fellow of the IEEE.

Ramesh Harjani received the Ph.D. degree in electrical engineering from Carnegie Mellon University, Pittsburgh, PA in 1989. He is currently an Associate Professor in the Department of Electrical Engineering at the University of Minnesota. He co-founded Bermai, Inc, a startup company developing CMOS chips for wireless LAN applications. His research group was the winner of the SRC Design Challenge in 2000 and in 2003. He was an Associate Editor for IEEE Transactions on Circuits and Systems Part II from 1995 to 1997 and the Chair of the IEEE Circuits and Systems Society technical committee on Analog Signal Processing from 1999 to 2000. He was a Distinguished Lecturer of the IEEE Circuits and Systems Society for 2001-2002. His research interests include analog/RF circuits for wired and wireless circuits, low power analog design, sensor interface electronics and analog and mixed-signal circuit test.

A. H. Tewfik received his B.Sc. degree from Cairo University, Cairo Egypt, in 1982 and his M.Sc., E.E. and Sc.D. degrees from the Massachusetts Institute of Technology, Cambridge, MA, in 1984, 1985 and 1987 respectively. He is the E. F. Johnson professor of Electronic Communications with the department of Electrical Engineering at the University of Minnesota. He worked at Alphatech, Inc., served as a consultant to MTS Systems, Inc., Rosemount, Inc., CyberNova, and worked with Texas Instruments and Computing Devices International. He was the President and CEO of Cognicity, Inc., an entertainment marketing software tools publisher that he co-founded, on partial leave of absence from the University of Minnesota. His current research interests are in signal processing for high performance local and personal area wireless networks, pervasive datanomic computing, multimedia and genomics. Prof. Tewfik is a Fellow of the IEEE, was a Distinguished Lecturer of the IEEE Signal Processing Society in 1997 – 1999, gave several plenary and key note speeches at IEEE conferences and workshops and received the IEEE third Millennium award in 2000.

Lawrence E. Larson received the BS and M.Eng. degree from Cornell University, and the PhD degree in Electrical Engineering from UCLA. From 1980 to 1996 he was at Hughes Research Laboratories in Malibu, CA, where he directed the development of high-frequency microelectronics in GaAs, InP and Si/SiGe and MEMS technologies. He joined the faculty at the University of California -San Diego, in 1996, where he is the inaugural holder of the Communications Industry Chair. He is currently Director of the UCSD Center for Wireless Communications. He has published over 200 papers, co-authored three books, has received 27 US patents, and is a Fellow of the IEEE.

Anuj Batra received the B.S. degree, with distinction, in electrical engineering from Cornell University, Ithaca, NY, in 1992; the M.S. degree in electrical engineering from Stanford University, Stanford, CA, in 1993; and the Ph.D. degree in electrical engineering from Georgia Institute of Technology, Atlanta, in 2000. In 1992, he was with Raytheon E-Systems, Falls Church, VA, where he designed algorithms for a software-defined radio based on the AMPS standard. In 2000, he joined the Digital Signal Processing Solutions (DSPS) Research and Development Center, Texas Instruments, Inc. (TI), Dallas, TX. Recently, Dr. Batra helped start an internal UWB development effort and co-authored the MultiBand OFDM (MBOA) proposal. He is currently a Member, Group Technical Staff at TI and his research interests are in the areas of wireless communications, in particular, the design of high-speed wireless networks, multi-user detection theory, and coexistence between unlicensed wireless devices. Since joining TI, he has also been involved in standardization activities for IEEE 802.15.3a, IEEE 802.11g, IEEE 802.15.2 and Bluetooth. Dr. Batra is a member of Eta Kappa Nu and Tau Beta Pi.

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